Here is the full list of all 74 Kingdom Rush achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Have your Elves deal 10000 points of damage.
Discover the hidden monster under water.
Fire the Sunray 20 times.
Free the sasquatch on the Icewind Pass.
Defeat Moloch the Demon Overlord.
Defeat 9 legions before they replicate.
Sell 30 towers.
Change soldiers' rally point 200 times.
Sell 5 towers in a single mission.
Build 4 Tesla towers in any stage.
Complete all iron stages.
Complete all heroic stages.
Summon 5 rock elementals in any one stage.
Have at least 3 Imperial Guards survive in the Citadel.
Complete the campaign in Veteran mode.
Kill 10 or more sheep with your hands.
Do not let The Kingpin escape.
Defeat Sarelgaz and its minions.
Help Fredo escape.
Defeat Myconid, the Rotten Fungus.
Train 1.00 soldiers.
Kill 25 Shrooms without them poisoning your soldiers.
Defeat Lord Blackburn to avoid war between kingdoms.
Send 1.000 soldiers to their deaths.
Kill 300 enemies with electricity.
Capture the attention of the mysterious crow.
Defeat Greenmuck and its minions.
Kill 15 Wererats before they sicken any soldier.
Have a single barbarian kill 10 enemies.
Find the ninja master rat.
Defeat Ulguk-Hai the Troll Warlord.
Kill 10.000 enemies.
Find the 5 legendary lost ice-shrooms.
Earn 45 stars.
Defeat 10 Troll Pathfinders while they're treading on ice.
Find the elusive acorn.
Defeat Gul'Thak and its minions.
Drop 1.000 or more bomblets with the cluster bomb.
Throw 500 or more axes.
Complete the campaign.
Defeat Vez'nan.
Train a hero up to max level.
Have your soldiers regenerate a total of 50.000 life.
Teleport 250 or more enemies.
Have your soldiers survive the explosion of 300 demons.
Train a hero up to level 5.
Have your Paladins perform 100 Holy Strikes.
Have your Paladins heal a total of 7.000 life.
Hold 500 or more enemies with Wrath of the Forest.
Polymorph 50 enemies into sheep.
Build all 8 towers specializations.
Earn 30 stars.
Defeat J.T.
Shoot 100 missiles.
Kill 50 enemies by poison damage.
Snipe 50 enemies.
Disintegrate 50 or more enemies.
Build 150 towers.
Kill 2.500 enemies
Catch a fish.
Build 100 towers.
Call all waves early in a single mission.
Kill 100 enemies with meteor showers.
Defeat The Juggernaut
Earn 15 stars.
Recruit max elves at The Silveroak Outpost.
Call 10 waves early.
Upgrade all basic tower types to level3.
Build 30 towers.
Kill 500 enemies.
Open 5 information cards.
Use Rain of Fire 5 times in a single stage.
Call a wave within 3 seconds of the icon showing up.
Kill one enemy.